allow to set a custom anti-captcha api url (#1473)

src/invidious/helpers/helpers.cr

@@ -95,6 +95,7 @@ struct Config
   @[YAML::Field(converter: Preferences::StringToCookies)]
   property cookies : HTTP::Cookies = HTTP::Cookies.new               # Saved cookies in "name1=value1; name2=value2..." format
   property captcha_key : String? = nil                               # Key for Anti-Captcha
+  property captcha_api_url : String = "https://api.anti-captcha.com" # API URL for Anti-Captcha
 
   def disabled?(option)
     case disabled = CONFIG.disable_proxy

src/invidious/jobs/bypass_captcha_job.cr

@@ -23,7 +23,8 @@ class Invidious::Jobs::BypassCaptchaJob < Invidious::Jobs::BaseJob
 
             headers = response.cookies.add_request_headers(HTTP::Headers.new)
 
-            response = JSON.parse(HTTP::Client.post("https://api.anti-captcha.com/createTask", body: {
+            response = JSON.parse(HTTP::Client.post(config.captcha_api_url + "/createTask",
+              headers: HTTP::Headers{"Content-Type" => "application/json"}, body: {
               "clientKey" => config.captcha_key,
               "task"      => {
                 "type"                => "NoCaptchaTaskProxyless",
@@ -39,7 +40,8 @@ class Invidious::Jobs::BypassCaptchaJob < Invidious::Jobs::BaseJob
             loop do
               sleep 10.seconds
 
-              response = JSON.parse(HTTP::Client.post("https://api.anti-captcha.com/getTaskResult", body: {
+              response = JSON.parse(HTTP::Client.post(config.captcha_api_url + "/getTaskResult",
+                headers: HTTP::Headers{"Content-Type" => "application/json"}, body: {
                 "clientKey" => config.captcha_key,
                 "taskId"    => task_id,
               }.to_json).body)
@@ -76,9 +78,10 @@ class Invidious::Jobs::BypassCaptchaJob < Invidious::Jobs::BaseJob
               inputs[node["name"]] = node["value"]
             end
 
-            captcha_client = HTTPClient.new(URI.parse("https://api.anti-captcha.com"))
+            captcha_client = HTTPClient.new(URI.parse(config.captcha_api_url))
             captcha_client.family = config.force_resolve || Socket::Family::INET
-            response = JSON.parse(captcha_client.post("/createTask", body: {
+            response = JSON.parse(captcha_client.post("/createTask",
+              headers: HTTP::Headers{"Content-Type" => "application/json"}, body: {
               "clientKey" => config.captcha_key,
               "task"      => {
                 "type"                => "NoCaptchaTaskProxyless",
@@ -94,7 +97,8 @@ class Invidious::Jobs::BypassCaptchaJob < Invidious::Jobs::BaseJob
             loop do
               sleep 10.seconds
 
-              response = JSON.parse(captcha_client.post("/getTaskResult", body: {
+              response = JSON.parse(captcha_client.post("/getTaskResult",
+                headers: HTTP::Headers{"Content-Type" => "application/json"}, body: {
                 "clientKey" => config.captcha_key,
                 "taskId"    => task_id,
               }.to_json).body)